Ushui, now often referred to as the Uyang River in Uyang County, Henan Province. Located in the southern part of the county, there is the only known counter-current river in China, commonly known as the "South River". In the name of "river", the Gan River is the only river in China that flows from south to north. Domestic rivers, basically from west to east, from north to south, while the South River in Uyang, from east to west.